WO2016084833A1

WO2016084833A1 - Method for producing optical module

Info

Publication number: WO2016084833A1
Application number: PCT/JP2015/083034
Authority: WO
Inventors: 忠嘉佐山; 洋平葛西; 望豊原
Original assignee: 株式会社フジクラ
Priority date: 2014-11-25
Filing date: 2015-11-25
Publication date: 2016-06-02
Also published as: JP2016099573A

Abstract

This method for producing an optical module comprises: a component affixing step P1 wherein an incidence end of an optical fiber 50 and an optical component containing a light source are arranged on a base plate 2, which serves as the bottom plate of a case, so that light emitted from the light source arranged on the base plate 2 is incident on the optical fiber 50; and a frame body affixing step P2 wherein a frame body 32, which serves as the side wall of the case, is affixed onto the base plate 2 so as to surround the optical component and the incidence end of the optical fiber. The frame body 32 is provided with a cut 35a for leading out the optical fiber therefrom. After affixing the frame body 32 to the base plate 2 by screwing in the frame body affixing step P2, the space between the frame body 32 and the optical fiber 50 in the cut 35a for leading out the optical fiber is sealed with an elastically deformable bush 55.

Description

Manufacturing method of optical module

The present invention relates to an optical module manufacturing method, which is suitable for downsizing an optical module to be manufactured.

As one of optical modules, an optical module in which light emitted from a plurality of laser diodes is emitted through an optical fiber is known. In this optical module, an optical fiber is led out from the inside of the housing, and a plurality of laser diodes, a plurality of mirrors, lenses, and the like are arranged in the housing. The light emitted from each laser diode is collected and then incident on the optical fiber, and is emitted from the optical fiber outside the housing.

The following Patent Document 1 describes a method for manufacturing such an optical module. In this optical module manufacturing method, a laser diode is arranged on the bottom plate of the casing, and then a frame body serving as a side surface of the casing is arranged on the bottom plate. The frame is provided with an optical fiber connector and a power connector. And after arrange | positioning a frame on a baseplate, position adjustment of an optical fiber is performed so that the light radiate | emitted from a laser diode may inject into an optical fiber.

International Publication No. 2013/123001

In order to adjust the position of the optical fiber so that light enters the optical fiber, it is necessary to adjust the position of the optical fiber by holding it with a jig such as a hand. However, in the method of manufacturing an optical module described in Patent Document 1, when the distance between the position where the optical fiber is disposed and the frame is small, the hand hits the frame and the optical fiber cannot be gripped. There is. For this reason, a space for the hand to hold the optical fiber is required between the optical fiber and the frame. On the other hand, there is a demand for downsizing the optical module.

Therefore, an object of the present invention is to provide an optical module manufacturing method capable of downsizing the optical module.

In order to solve the above problems, an optical module manufacturing method according to the present invention includes an optical component including the light source so that light emitted from a light source disposed on a base plate serving as a bottom plate of a housing enters an optical fiber; A component fixing step of fixing the incident end of the optical fiber on the base plate; and a frame fixing step of fixing a frame body serving as a side wall of the housing on the base plate so as to surround the optical component and the incident end. The frame body is formed with a notch for leading out the optical fiber, and after the frame body and the base plate are fixed by screwing in the frame body fixing step, A gap between the frame and the optical fiber in the notch is sealed with an elastically deformable bush.

According to such an optical module manufacturing method, the optical component and the optical fiber are fixed so that the light emitted from the light source enters the optical fiber before the frame is fixed to the base plate. In order to fix the optical component and the optical fiber in this way, generally, after the optical component and the optical fiber are arranged on the base plate, the relative position between the optical component and the optical fiber is finely adjusted. And the optical fiber is fixed. At this time, since the adjustment can be performed before the frame is fixed, a jig such as a hand that holds the optical component or the optical fiber does not hit the frame. Therefore, even when the space between the frame and the optical component or the optical fiber is narrow in the manufactured optical module, the position of the optical component or the optical fiber can be adjusted. Thus, according to the manufacturing method of the optical module of the present invention, the space for adjusting the position of the optical component and the optical fiber can be narrowed or omitted, and thus the manufactured optical module can be reduced in size. .

In addition, because the optical fiber is cut out in the frame, the frame is easily fixed to the base plate so that the optical fiber is led out from the frame after the optical fiber is placed on the base plate. can do. Further, when the light source emits light, the light source generally generates heat. Due to this heat generation, the frame surrounding the light source may be slightly deformed. Even when the frame body is deformed in this way, the notch can absorb the deformation, so that the stress due to the deformation of the frame body can be prevented from being transmitted to the base plate. Therefore, even when the frame is deformed by the heat generated by the light source, the deformation of the base plate can be suppressed, and the optical fiber axis and the optical axis of the light incident on the optical fiber can be prevented from shifting. it can.

In addition, since the bush fills an unnecessary gap in the notch for leading out the optical fiber, it is possible to prevent dust and the like from entering the casing through the gap. Further, since at least a portion of the bush contacting the frame body can be elastically deformed, the notch can absorb the deformation of the frame body while sealing the gap.

Also, since the frame is fixed to the base plate by screwing, the manufactured optical module can be easily maintained. Furthermore, by fixing the frame and the base plate by screwing, the relative positions of the frame and the base plate are determined by the positions of the screw holes. Thus, after the relative position between the frame body and the base plate is determined, sealing is performed by the bush, so that the bush can be arranged according to the position of the cutout of the frame body, and the deformation of the bush is reduced. be able to. Therefore, the bush is deformed to such an extent that no gap is formed, but stress is suppressed from being applied to the optical fiber.

Further, it is preferable that the bush has an outer shape along an edge of the notch for leading out the optical fiber and a surface of the base plate on the frame body side.

The outer shape of the bush is the above shape, so that the bush is less susceptible to stress from the frame body and the base plate while the bush fills the notch, and stress is applied to the optical fiber via the bush. Can be suppressed.

In the component fixing step, it is preferable that a connector for supplying power to the light source is disposed on the base plate, and the frame is formed with a notch for leading out the connector.

By forming the connector lead-out in the frame, the frame can be easily fixed to the base plate so that the connector is led out from the frame after the connector is arranged on the base plate. Further, even when the frame body is deformed as described above, the connector lead-out notch can absorb the deformation, so that the stress due to the deformation of the frame body is prevented from being transmitted to the base plate. And the deformation of the base plate can be suppressed.

In this case, it is preferable that a gap between the frame body and the connector in the connector lead-out notch is sealed by a bush capable of elastically deforming at least a portion in contact with the frame body.

In this case, dust or the like can be prevented from entering the housing from an unnecessary gap in the connector lead-out notch. In addition, since at least a portion of the bush contacting the frame body can be elastically deformed, the notch can absorb the deformation of the frame body while sealing the gap.

Also, in the frame fixing step, it is preferable that a flange extending along the base plate is connected to an edge of the frame on the base plate side, and the flange and the base plate are fixed to each other.

される By fixing the collar part to the base plate, the collar part becomes a heat radiating fin, and the efficiency of heat radiation can be increased. Therefore, the deformation of the base plate can be further suppressed.

Further, it is preferable that a position adjacent to the notch for leading out the optical fiber of the frame body in the collar portion is notched.

If the frame has a distortion before being attached to the base plate due to the notch being cut out as described above, the notch of the flange is deformed to absorb the distortion and the distortion of the frame. Can be prevented from being transmitted to the base plate.

In the frame fixing step, it is preferable that a top plate serving as a top plate of the housing is connected to the frame.

Since the top plate is connected to the frame body, it is not necessary to connect the plate as the top plate to the frame body after the frame body is fixed to the base plate, and the manufacturing process of the optical module can be simplified.

As described above, according to the present invention, an optical module manufacturing method capable of reducing the size of an optical module is provided.

It is a figure which shows the optical module which concerns on embodiment of this invention. It is a figure which shows the optical module shown in FIG. 1 from another viewpoint. It is the figure which removed the cover body of the optical module shown in FIG. It is a figure which sees the lid shown in Drawing 1 from the back. It is a flowchart which shows the process of the manufacturing method of an optical module. It is a figure which shows the mode of a component fixing process. It is a figure which shows the mode of a frame fixing process.

Hereinafter, preferred embodiments of a method for manufacturing an optical module according to the present invention will be described in detail with reference to the drawings.

<Optical module>
First, the optical module of this embodiment will be described.

FIG. 1 is a diagram showing an optical module according to this embodiment, and FIG. 2 is a diagram showing the optical module of FIG. 1 from a different viewpoint from FIG.

As shown in FIGS. 1 and 2, the optical module 1 of the present embodiment includes a casing made up of a base plate 2 and a lid 3, optical components to be described later fixed in the casing, and some optical components. The connector 41 for supplying the optical fiber 50 and the optical fiber 50 are provided as main components.

FIG. 3 is a diagram with the cover of the optical module shown in FIG. 1 removed. In FIG. 3, the state of light is indicated by broken lines. The base plate 2 is a metal plate serving as a bottom plate of the housing, and is a flat plate member as shown in FIG. A plurality of screw holes 27 are formed in the outer peripheral portion of the base plate 2.

The optical component, the optical fiber 50, and the connector 41 are fixed on the base plate 2. The optical component of this embodiment includes a laser diode 11, a mirror 13, a first lens 14, and a second lens 15.

A plurality of laser diodes 11 serving as light sources are elements having a Fabry-Perot structure formed by laminating a plurality of semiconductor layers, and emit laser light having a wavelength of, for example, 900 nm. Each laser diode 11 is fixed on the laser mount 12 with solder or the like, and is fixed on the base plate 2 via the laser mount 12. The laser mount 12 is a table for adjusting the height of the laser diode 11, and each laser mount 12 is fixed to a predetermined position on the base plate 2 by, for example, soldering. In this way, the laser mount 12 may be separated from the base plate 2 and the laser mount 12 may be fixed on the base plate 2, but the laser mount 12 may be molded integrally with the base plate 2. Alternatively, the laser mount 12 may be omitted when the height adjustment of the laser diode 11 is unnecessary.

A plurality of mirrors 13 are arranged on the base plate 2 corresponding to the respective laser diodes 11. Each mirror 13 is adjusted to reflect light emitted from the corresponding laser diode 11 vertically along the surface direction of the base plate 2. The mirror 13 of the present embodiment is composed of a prism and is fixed on the base plate 2 with an adhesive. In addition, the mirror 13 may be comprised other than a prism like the glass body in which the reflecting film was formed.

The first lens 14 and the second lens 15 are each formed of a cylindrical lens, and are fixed on the base plate 2 by adhesion. The first lens 14 condenses the fast direction component of the light reflected by each mirror 13, and the second lens 15 condenses the slow direction component of the light emitted from the first lens 14. Thus, the light emitted from the second lens 15 collects the light at a predetermined position. Note that when the light emitted from the second lens 15 does not collect light at a desired position, a condensing lens that collects the light emitted from the second lens 15 may be further disposed on the base plate 2.

The optical fiber 50 is inserted into a pipe-shaped holder 51 and fixed to the holder 51. In the present embodiment, one end serving as the light incident end of the optical fiber 50 is slightly led out from the holder 51. The holder 51 is fixed to the fiber mount 52, and the fiber mount 52 is fixed to the base plate 2. One end of the optical fiber 50 is at a position where light emitted from the second lens 15 can enter the core. In this embodiment, the optical fiber 50 is fixed to the holder 51 by an adhesive or soldering, the holder 51 is fixed by being bonded to the fiber mount 52, and the fiber mount 52 is fixed to the base plate 2 by bonding. Has been. Thus, the incident end of the optical fiber 50 is indirectly fixed on the base plate 2.

The connector 41 is formed of a pair of rod-shaped conductors, and each conductor is fixed to a pair of connector holders 42. Each connector holder 42 is bonded and fixed to the base plate 2. One conductor of the connector 41 is connected to the laser diode 11 closest to the connector 41 by a gold wire (not shown), and each laser diode 11 is daisy chain connected by a gold wire (not shown). The laser diode 11 farthest from the connector 41 is connected to the other conductor of the connector 41 by a gold wire (not shown).

FIG. 4 is a view of the lid shown in FIG. 1 viewed from the back side. As shown in FIG. 4, the lid body 3 of the present embodiment is formed by pressing a metal plate, and includes a top plate 31, a frame body 32, and a flange portion 33.

The top plate 31 is a part that becomes a top plate of the casing, and is made of a flat plate-like member. The frame body 32 is a part that is vertically connected to the top plate 31 at the periphery of the top plate 31. Further, the frame body 32 is sized to surround the optical component, the incident end of the optical fiber, and the like in a state where the lid body 3 is disposed on the base plate 2 as shown in FIGS. Further, the frame 32 is formed with a notch 35a for leading the optical fiber 50 from the inside of the housing to the outside of the housing, and a notch 35b for leading the connector 41 from the inside of the housing to the outside of the housing. The flange portion 33 is a portion connected to the frame body 32 on the side opposite to the top plate 31 side of the frame body 32, and is outside the frame body 32 perpendicular to the frame body 32 (parallel to the top plate 31). It extends to spread. Moreover, the position adjacent to each

notch

35a, 35b of the frame 32 in the collar part 33 is each notched. When the flange portion 33 is cut out in this way, when the frame body 32 has distortion before being attached to the base plate 2, the cutout of the flange portion 33 absorbs the distortion, and the frame body 32. Can be prevented from being transmitted to the base plate 2. In addition, a plurality of screw holes 37 are formed in the flange portion 33, and the positions where these screw holes 37 are formed are arranged on the base plate 2 with the lid 3 as shown in FIGS. In this state, the position overlaps with the screw hole 27 formed in the base plate 2.

As shown in FIGS. 1 and 2, the base plate 2 and the lid body 3 are arranged on the base plate 2, as shown in FIGS. 1 and 2, and the screw holes 27 of the base plate 2 and the lid body 3. It is fixed by a plurality of screws 25 screwed into the screw holes 37. Although not particularly illustrated, in this embodiment, a silicone resin is interposed between the base plate 2 and the flange portion 33 of the lid 3 so that the airtightness between the base plate 2 and the flange portion 33 is maintained. Further, even when the frame body 32 is deformed by the silicone resin, the space between the frame body 32 and the base plate 2 can be filled and the deformation can be absorbed.

Further, with the lid 3 placed on the base plate 2 as described above, the holder 51 is led out from the notch 35a together with the optical fiber 50 as shown in FIG. In the cutout 35 a, a bush 55 is disposed between the holder 51 and the frame body 32 to fill a gap between the holder 51 and the frame body 32. Thus, the gap between the frame 32 and the optical fiber in the notch 35 a is sealed by the bush 55. The bush 55 is configured such that at least a portion in contact with the frame body 32 can be elastically deformed. As a configuration of such a bush 55, for example, a part in contact with the frame body 32, a part in contact with the base plate 2, and a part in contact with the holder 51 are made of an adhesive resin whose main component is a modified silicone resin. It is mentioned that the part surrounded by the resin is made of a hard resin such as polyetheretherketone resin (PEEK). The entire bush 55 may be made of an elastically deformable resin.

The bush 55 has an outer shape along the edge of the notch 35a and the surface of the base plate 2 on the frame body 32 side. Since the outer shape of the bush 55 has such a shape, the bush 55 hardly receives stress from the frame body 32 and the base plate 2 while the bush 55 fills the gap of the notch 35a. Thus, the stress applied to the optical fiber 50 can be suppressed.

In addition, with the lid 3 placed on the base plate 2, the connector 41 is led out from the notch 35b as shown in FIG. A bush 45 is disposed between the connector 41 and the frame 32, and a gap between the frame 32 and the connector 41 in the notch 35 b is sealed by the bush 45. The bush 45 is made of an elastically deformable resin at least at a portion in contact with the frame body 32, for example, made of the same resin as the bush 55.

Next, the optical operation of the optical module 1 will be described.

When desired power is supplied to each laser diode 11 from the connector 41, each laser diode 11 emits light toward each mirror 13 corresponding to each laser diode 11, as shown in FIG. To do. This light is, for example, laser light having a wavelength of 900 nm as described above. Each mirror 13 reflects incident light vertically along the surface direction of the base plate 2. The light reflected by the mirror 13 enters the first lens 14, and the fast direction component of the light is collected by the first lens 14. The light emitted from the first lens 14 enters the second lens 15, and the slow direction component of the light is collected by the second lens 15. The light collected by the second lens 15 enters the core of the optical fiber 50 and propagates through the optical fiber 50. Thus, light is emitted from the other end of the optical fiber 50.

By the way, when the optical module 1 operates in this way, a part of the input electric power is emitted as optical energy, while the other part is thermal energy. Most of this thermal energy is generated from the laser diode 11, and most of the heat generated in the laser diode 11 is transmitted to the base plate 2, but the base plate 2 is cooled by a cooling device installed on the lower surface of the base plate 2. When the base plate 2 is deformed by heat, the relative position between the optical components and the relative position between the optical component and the optical fiber may change, and the incident efficiency of light into the optical fiber may be reduced. Therefore, the base plate 2 is cooled, so that the base plate 2 is prevented from being deformed by heat.

However, part of the heat is transferred to the lid 3. When heat is transmitted to the lid 3, the top plate 31 and the frame 32 are deformed to expand. However, in the optical module 1 of the present embodiment, the frame 32 is formed with a notch 35a for leading out the optical fiber and a notch 35b for leading out the connector 41. This notch absorbs at least a part of the stress caused by the deformation of the frame body 32. For this reason, it is possible to suppress the stress due to the deformation of the frame body 32 from being transmitted to the base plate 2. Therefore, even if the frame 32 is deformed, the deformation of the base plate 2 can be suppressed, and the light incident efficiency on the optical fiber 50 can be suppressed from being reduced.

In addition, in the

bushes

55 and 45 of the present embodiment, at least a portion in contact with the frame body 32 can be elastically deformed. Therefore, an unnecessary gap in the notch 35a for leading out the optical fiber 50 or the notch 35b for leading out the connector 41 is filled to prevent dust and the like from entering the housing from the gap, while the notch is not as described above. The deformation of the frame can be absorbed.

Further, in the optical module 1 of the present embodiment, since the lid 3 has the flange portion 33 and the flange portion 33 is fixed to the base plate 2, the flange portion 33 becomes a radiating fin and can increase the efficiency of heat dissipation. . Therefore, the deformation of the base plate 2 can be further suppressed.

Moreover, since the cover 3 and the base plate 2 are fixed by screwing, the optical module 1 of this embodiment can be easily maintained.

<Optical module manufacturing method>
Next, the manufacturing method of the optical module of this embodiment is demonstrated.

FIG. 5 is a flowchart showing the steps of the method for manufacturing the optical module 1 of the present embodiment. As shown in FIG. 5, the optical module manufacturing method of the present embodiment includes a component fixing step P1 and a frame fixing step P2.

(Part fixing process P1)
In the component fixing step P1, the optical component including the laser diode 11 and the incident end of the optical fiber 50 are fixed on the base plate 2 so that the light emitted from the laser diode 11 disposed on the base plate 2 enters the optical fiber 50. It is a process to do. FIG. 6 is a diagram showing the state of this process.

The laser diode 11 is fixed on the base plate 2 via the laser mount 12 as described above. Therefore, before the laser diode 11 is disposed on the base plate 2, the laser diode 11 is disposed and fixed on the laser mount 12. Fixing is performed by soldering, for example. Thereafter, the laser mount 12 on which the laser diode 11 is mounted is arranged on the base plate 2 and fixed. The main fixing is performed by soldering, for example.

The connector 41 is disposed on the base plate 2 via the connector holder 42 as described above. Therefore, before the connector 41 is disposed on the base plate 2, the respective rod-shaped conductors are inserted into the connector holder 42 to fix the conductors to the connector holder. This fixing is performed by adhesion, for example. And each connector holder 42 to which the conductor is fixed is arranged on the base plate 2 and fixed. This fixing is performed by adhesion, for example. Next, one conductor of the connector 41 and the laser diode 11 closest to the connector 41 are connected by a gold wire, and further, each laser diode 11 is daisy chain connected by a gold wire, and further away from the connector 41. The laser diode 11 and the other conductor of the connector 41 are connected by a gold wire. Thus, the connector 41 and each laser diode 11 are electrically connected, and power can be supplied to each laser diode 11 via the connector 41.

The optical fiber 50 is arranged on the base plate 2 via the fiber mount 52 in a state of being fixed to the holder 51 as described above. Therefore, the optical fiber 50 is inserted into the holder 51 and fixed before the optical fiber 50 is arranged on the base plate 2. At this time, as shown in FIG. 6, a bush 55 is inserted into the optical fiber 50 in advance. Furthermore, when the optical fiber 50 is covered with a coating layer, the coating layer is peeled off by a predetermined distance from one end that is the incident end of the optical fiber 50. Then, the optical fiber 50 is inserted into the holder 51, and the optical fiber 50 is fixed to the holder. At this time, in the present embodiment, the incident end of the optical fiber 50 is slightly led out from the holder 51. The optical fiber 50 may be fixed to the holder 51 by soldering or a resin such as a thermosetting resin. Next, the holder 51 is fixed to the fiber mount 52. This fixing is performed by adhesion, for example. The holder 51 and the fiber mount 52 may be integrally formed. Then, the fiber mount 52 to which the optical fiber 50 is fixed is arranged on the base plate 2 and fixed. This fixing is performed by adhesion, for example.

The first lens 14 and the second lens 15 are directly arranged and fixed on the base plate 2 as described above. This fixing is performed by adhesion, for example. Specifically, an adhesive is applied to each position on the base plate 2 where the first lens 14 and the second lens 15 are arranged, and the first lens 14 and the second lens 14 are applied on the base plate 2 to which the adhesive is applied. The lens 15 is arranged and fixed by solidifying the adhesive.

Each mirror 13 is directly arranged and fixed on the base plate 2 as described above. This fixing is performed by adhesion, for example. Specifically, an adhesive is applied to each position on the base plate 2 where the mirror 13 is disposed, and the mirror 13 is disposed on the base plate 2 to which the adhesive is applied to solidify the adhesive. Fix it.

Before fixing all the optical components and the optical fiber 50 on the base plate 2, either one of the optical components or the optical fiber 50 is placed on the base plate so that the light emitted from the laser diode 11 enters the core of the optical fiber 50. 2, the position needs to be finely adjusted. The position of the mirror 13 is finely adjusted. Specifically, an optical component other than the mirror 13 and the connector 41 are fixed on the base plate 2 and power is supplied from the connector 41 so that light can be emitted from the laser diode 11. Further, the optical fiber 50 is fixed on the base plate 2. Thereafter, the mirror 13 is disposed on the base plate 2 to which the adhesive is applied, electric power is applied from the connector 41 to the laser diode 11, and light is emitted from each laser diode 11. The position of each mirror 13 is finely adjusted so that the light emitted from the laser diode 11 enters the core of the optical fiber 50. For example, the position of the mirror 13 is finely adjusted so that the energy of light emitted from the other end of the optical fiber 50 is maximized. Thus, the position of the mirror 13 is determined. Then, after the position of the mirror 13 is determined, the adhesive on which the mirror 13 is disposed is solidified and the mirror 13 is fixed.

Thus, as shown in FIG. 3, the respective optical components, the optical fiber 50, and the connector 41 are fixed on the base plate 2.

(Frame fixing process P2)
The frame fixing step is a step of fixing the frame 32 serving as the side wall of the housing on the base plate 2 so as to surround the optical component and the incident end of the optical fiber 50. FIG. 7 is a diagram showing the state of this process.

In this step, first, the lid 3 including the frame 32 is placed on the base plate 2 to which the optical component, the optical fiber 50, and the connector 41 are fixed. At this time, the frame 32 surrounds the optical component and the incident end of the optical fiber 50, the optical fiber 50 is led out of the frame 32 together with the holder 51 from the notch 35a, and the connector 41 is framed from the notch 35b. The base plate 2 and the lid 3 are aligned so that the screw holes 27 of the base plate 2 and the screw holes 37 of the flange portion 33 penetrate through the body 32. In addition, when a silicone resin is interposed between the base plate 2 and the flange portion 33 of the lid 3 as described above, the silicone resin is previously attached to the surface of the flange portion 33 on the base plate 2 side. Thus, the lid 3 is arranged on the base plate 2.

Next, the screw 25 is screwed into each of the screw hole 27 of the base plate 2 and the screw hole 37 of the flange 33 that penetrate each other, and the lid 3 is fixed on the base plate 2. Further, the bush 55 previously inserted into the optical fiber 50 as described above is fitted into the notch 35a and fixed. Further, each conductor of the connector 41 is inserted into the hole of the bush 45, and the bush 45 is fitted into the notch 35b and fixed. The bush 55 and the bush 45 are fixed by, for example, adhesion.

Thus, the optical module shown in FIGS. 1 and 2 is obtained.

As described above, according to the method for manufacturing the optical module 1 of the present embodiment, the light emitted from the laser diode 11 as the light source before the lid 3 including the frame 32 is fixed to the base plate 2 is the optical fiber 50. The optical components such as the laser diode 11 and the mirror 13 are fixed so as to be incident on. Therefore, a jig for finely adjusting the position of the optical component, the optical fiber 50 or the like does not hit the frame body 32. Therefore, even when the space between the frame 32 and the optical component or the optical fiber 50 in the optical module 1 is narrow, the position of the optical component or the optical fiber 50 can be adjusted. For this reason, according to the manufacturing method of the optical module 1 of this invention, since the space for adjusting the position of an optical component or the optical fiber 50 can be narrowed or abbreviate | omitted, the optical module 1 can be reduced in size. .

In addition, since the frame 32 is formed with a notch 35a for leading out the optical fiber 50 and a notch 35b for leading out the connector 41, even after the optical fiber 50 and the connector 41 are arranged on the base plate 2, the frame The frame body 32 can be easily fixed to the base plate 2 so that the optical fiber 50 and the connector 41 are led out from the body 32.

Further, the lid body 3 is formed by integrating the frame body 32 and the top plate 31. Therefore, there is no need to connect a plate as a top plate to the frame after the frame 32 is fixed to the base plate 2, and the optical module manufacturing process can be simplified.

As mentioned above, although the said embodiment was demonstrated to the example about this invention, this invention is not limited to these.

For example, if the optical fiber 50 and the connector 41 can be led out, at least one of the notch 35a and the notch 35b of the frame 32 is unnecessary. In this case, for example, the optical fiber 50 and the connector 41 are not attached to the frame 32. A lead-out opening may be formed. However, from the viewpoint that the deformation of the frame body 32 can be absorbed as described above, and from the viewpoint that the frame body 32 can be easily arranged on the base plate 2 in a state where the optical fiber 50 and the connector 41 are arranged. It is preferable that a cutout 35 a and a cutout 35 b are formed in the frame 32.

Further, in the above-described embodiment, the lid 3 is integrated with the frame 32 and the top plate 31 serving as the top plate of the housing. However, for example, the frame body 32 and the top plate 31 may be separate members, and after the frame body 32 is fixed on the base plate 2, the top plate 31 may be joined to the frame body. However, the frame body 32 and the top plate 31 are preferably integrated from the viewpoint of easily manufacturing the optical module 1.

Also, the buttock 33 is not an essential configuration. When there is no flange 33, the frame body 32 is directly fixed on the base plate 2. In this case, it may be fixed by soldering, or a screw hole may be formed in the frame 32 and fixed to the base plate 2 by screwing. Thus, when it does not have the collar part 33, the optical module 1 can be reduced in size. However, by having the flange portion 33, the frame body 32 can be fixed on the base plate 2 stably and easily.

The lid 3 is fixed on the base plate 2 by screwing, but may be fixed on the base plate 2 by a method other than screwing such as welding.

As described above, according to the present invention, an optical module manufacturing method capable of reducing the size of the optical module 1 is provided, and can be used in the field of, for example, a fiber laser device.

DESCRIPTION OF SYMBOLS 1 ... Optical module 2 ... Base plate 3 ... Cover 11 ... Laser diode 12 ... Laser mount 13 ... Mirror 14 ... 1st lens 15 ... 2nd lens 31 .... Top plate 32 ... Frame 33 ... Bridge 41 ... Connector 42 ... Connector holder 45 ... Bush 50 ... Optical fiber 51 ... Holder 52 ... Fiber mount 55 ... Bush P1 ... Part fixing process P2 ... Frame fixing process

Claims

A component fixing step of fixing an optical component including the light source and an incident end of the optical fiber on the base plate so that light emitted from the light source disposed on the base plate serving as a bottom plate of the housing enters the optical fiber; ,
A frame body fixing step of fixing a frame body serving as a side wall of the housing on the base plate so as to surround the optical component and the incident end;
With
The frame is formed with a notch for leading out the optical fiber,
After the frame body and the base plate are fixed by screwing in the frame body fixing step, the gap between the frame body and the optical fiber in the notch for leading out the optical fiber is an elastically deformable bush The manufacturing method of the optical module characterized by the above-mentioned.
2. The method of manufacturing an optical module according to claim 1, wherein the bush has an outer shape along an edge of the notch for leading out the optical fiber and a surface of the base plate on the frame body side.
In the component fixing step, a connector for supplying power to the light source is disposed on the base plate,
The method for manufacturing an optical module according to claim 1, wherein the connector is provided with a notch for leading out the connector.
The clearance gap between the said frame and the said connector in the notch for said connector derivation | leading-out is sealed by the bush which can be elastically deformed at least in the site | part which contact | connects the said frame. Manufacturing method of optical module.
An edge extending along the base plate is connected to an edge of the frame body on the base plate side,
5. The method of manufacturing an optical module according to claim 1, wherein in the frame fixing step, the flange portion and the base plate are fixed to each other.
6. The method of manufacturing an optical module according to claim 5, wherein a position of the frame body adjacent to the notch for leading out the optical fiber is notched.
7. The method of manufacturing an optical module according to claim 1, wherein a top plate serving as a top plate of the housing is connected to the frame body in the frame body fixing step. .